#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>

typedef struct Student {
	char name[20];
	int age;
	char sex[5];
	double score;
}Stu;

struct Student {
	char name[20];
	int age;
	char sex[5];
	double score;
}s4, s5, s6;
int main()
{
	struct Student s1, s2, s3;
	struct Student s[30];
	return 0;
}